Dust-collector.



C. STAHN.

DUST COLLECTOR.

APPLlCATlON FILED EEK. 7 19H.

1,9%,3B Patented Apr. 24, 1917.

3 SHEETS-SHEET Ir INVENTOR @Za aira s 55612 km i BY ATTORNEY C. STAHN.

DUST COLLECTOR.

APPLICATION FILED FEB-7,1917.

L mac l atented Apr. 24,1917.

3 SHEETSSHEET 2- iNVENTOR ;;/5; %%w BY Ma 6W DZIW I v ATTORNEY C. STAHN.

DUST COLLECTOR. APPLICATION man FEB. 7. 1911.

Patented Apr. 24,1917.

3 SHEETSSHEET 3- WITNESSES ATTORNEY "r or new Haven, nrsso nose-commerce.

Specification of Letters Patent.

Patented Apr. 24% 191%.

Application med February 7, 1917. serial Ito. 147,197.

To all whom it may concern:

Be it known that 1, CHARLES STAHN, a subject of the Emperor of Germany, residing at New Haven, in the county of Franklin and State of Missouri, have invented new and useful Improvements in Dust-Collectors, of which the following is a specification.

This invention relates to dust collectors especially adapted to be used in conjunction with grinding stones or similar machines for removing particles of dust from the air and it consists in the novel features hereinafter described and claimed.

An object of the invention is to provide a collector of the character stated which is of simple and durable structure andwhich will eiiiciently remove the particles of dust from the air, the parts of the collector being so arranged that the air after it has been relieved of the dust may escape from the collector, there being means provided for conveying a volume of the air from the collector and discharging the same at a point distant therefrom.

With the above object in view the collector comprises a frame having a casing located at the lower portion thereof and means for discharging a blast of air into the casing. A conveyer is mounted for movement in the casing and a worm conveyer is adapted to receive the dust from the first mentioned conveyer. Radially disposed partitions are arranged in the upper portion of the easing and a drum is rotatably mounted in the casing. The said drum is provided at its sides with an opening and below the opening the drum carries a blade which is arranged to rotate within the casing whereby the spaces between the lower edges of the adjacent partitions are successively closed. A discharge pipe is connected with the upper portion of the drum. The said casing is provided at its top side with a number of openings which are located between the said partitions. Spring supported sectors are mounted above the casing and means are provided for vibrating the said sectors vertically and successively with relation to each other. Bags or tubes of textile material are connected at their upper ends with the said sectors and are closed by the same and the lower ends of the said bags or tubes are connected with openings at the top side of the casing.

in the accompanying drawing 2-- Figure 1 is a side elevation of the dust collector;

2 is a top plan view of the same;

Fig. 3 1s a vertical sectional view of the same;

Fig. 4 is a horizontal sectional view of the same cut on the line 4l4c of Fig. 1; r

Fig. 5 is a similar view out on the line 5-5 of Fig. 1;

Fig. 6 is a detailed sectional view of parts of the upper portion of the collector;

Fig. 7 is a perspective view of the drum and blades used in the collector.

The dust collector comprises a frame 1 which is of wood or any other suitable material and which is provided at its lower portion with a casing 2. A pipe 3 communicates with one side of the casing 2 and through which the dust laden air is introduced into the casing by means of a blower or other suitable device. Radially disposed partitions 4 are arranged in the upper portion of the casing 2 and the said casing is provided at a line spaced below the lower edges of the partition 4 with an inwardly disposed annular ledge 5. llhe casing 2 is provided at its top side with a number of openings 6 which are located between the partitions 4. The casing 2 isprovided at its bottom side and in the vicinity of one edge thereof with a trough 7 in which a worm conveyer 8 is journaled for rotation. A shaft 9 is journaled for rotation in the casing 2 and carries sprocket Wheels 10. A shaft 11 is also journaled in the'casing 2 in parallel relation with the shaft 9 arid carries sprocket wheels 12 which are alined with the sprocket wheels 10. Sprocket chains 13 are trained around the alined sprocket wheels 10 and 12 and the said chains carry cross slats 14 which are adapted to move along the bottom of the casing 2 toward the trough 7 when the shaft 9 is rotated. A sprocket wheel 15 is mounted upon the shaft of the worm 8 and a sprocket wheel 16 is mounted upon one end of the shaft 9. A sprocket chain 17 is trained around the sprocket wheels 15 and 16 and is adapted to transmit rotary movement from the shaft of the worm to the shaft 9.

A shaft 18 is journaled for rotation at the upper portion of the frame 1 and carries at one end a belt wheel or pulley 19 around which a belt (not shown) may be trained sprocket wheel is mounted upon the shaft" for the purpose of rotating the shaft 18. i A

18 and a sprocket wheel 21 is mounted upon .theshaft of the worm 8. A sprocket chain "22 is trained around the sprocket wheels 20. and 21 and is adapted to transmit rotary tions. The drum 26 is provided at its side movement from the shaft 18 to the worm 8.

A shaft 23 is journaled for rotation at the 1 intermediate portion of the frame 1 and is disposed vertically thereon. A gear wheel [24 1s carriedat the upper end of the shaft 23 and meshes with a worm 25 which is mounted upon the shaft'18. The shaft 23 carries atits lower end a hollow drum 26 which is located between the inner ends of the partitions 4 and which may turn with the shaft 23 between the inner ends of the said partiwith an opening 27 and the said drum carries a blade 28 which is] located below the opening 27 and which is arranged to move below the lower edges of the partitions 4.

Y The said blade 28 is sector in plan and the edge of the said blade is adapted to move along the ledge 5 of the casing 2. The inner portion of the blade 28 closes the lower end of the drum 26 "and the upper end of thesaid drum is closed b a disk 29 through which the lower portion of the shaft 23 passes. A pipe 30 is connected at one end with the disk 29 and extends up along the intermediate portion of the shaft 23 and .34 in elevated then leads beyond one side of the frame 1 as best shown in Fig. 3 ofthe drawing.

Brackets 31 are mounted upon the upper portion ofthe frame 1 and vertically disposed bolts 32 are slidably mounted in the said brackets. The said-bolts are restrained against turning movement in the said brackets by means of splines or keys 33. The

bolts 32 carry at their upper ends beveled heads 34 and the wheel 24 carries at its under side a set of ratchet teeth 35 which areadapted to engage the beveled heads 34 of the bolts 32 successively as the wheel 24 described is located upon the wheel 24 at a 5 point vertically above the blade 28 hereinbefore .described. Bags or tubes 39 of woven fabric material are connected at their upper ends with the sectors 38 andthe said bags or tubes are connected at their lower ends with the top side of the casing 2 and the lower end portions of the said bags or tubes surround the openin 6 provided at the top side of the said casing. These bags or arenormally held stretched or taut parted to the bags or tubes 39 connected [therewith and this has the effect of loosening any dirt which might have collected at the inner surface of the said bags or tubes.

In operation the dust laden air is forced into the casing through the pipe 3 and any particles of dust which may settle from the said volume of 'air'u on the bottom of the said casing is operated by the said particles are moved to the trough 7 and are encountered by the worm 8 which moves in beyond one side of the casing 2. At the same time some of the air which carries the dust will pass up into the bags or tubes 39 and some of the dust will deposit in the inner surfaces of the said bags or tubes while the said bags or tubes are stretched or in taut condition. Some of the air will escape through the meshes of material which constitutes the bags or tubes and this air is freed or comparatively freed of particles of dust. At the same time the shaft 23 is rotating and the blade 28 is be- .ing carried successively under the edges of the adjacent partitions 4. In view of the fact that the said blade is of suflicient breadth to bridge the space between the adacent partitions when it is so positioned it cuts off the blast of air from the pipe 3 to the bags or tubes 39 immediately above. At the same time the ratchet teeth 35 are engaging the head of that bolt 32 which is above the said bags or tubes and a vertical reciprocatory movement is imparted to that sector which is connected with the upper ends of the said tubes and hence the said tubes receive a shaking movement or action which has a. tendency to loosen any particles of dust from the inner surfaces thereof which may have collected thereon. These particlesof dust fall down through the tubes and deposit upon the upper surface of the blade 28. under the edges of the partitions 4 the said partitions sweep or break the said particles of dust from the upper surface of the blade and they fall down the casing 2 and are operated upon by the slats 14 and carried into the trough 7 from whence they are ejected by the worm 8 as hereinbefore described.

In view of the fact that the opening 27 tions 4 the. air which is between the said by the slats 14 Where As '.the said blade continues to move partitions and in the tubes or bags 39 above the space between the same are relieved of the pressure of the blast from the pipe 3 and hence this air may pass down through the tubes and between the adjacent artitions 4 and out through the opening 2 and the pipe 80. In view of the fact that this air may contain some particles of dust it is desired to conduct the same to a point remote from the dust collector where it may be discharged or it may be returned to the pipe 3.

From the foregoing description taken in conjunction with the accompanying draw ing, it will be seen that a dust collector of simple and durable structure is provided and that the same may be economically used for efliciently removing dust from the air thus making it possible to keep the air comparatively free from particles of flying dust.

Having described the invention What IS claimed is 2- i 1. A dust collector comprising a frame, a casing carried by the frame, means for introducing dust laden air into the casing, radially disposed partitions arranged in the upper portion of the casing, a drum journaled for rotation in the casing between.

the said partitions and provided at its sides with an opening, a blade carried by the drum and located below the said opening, woven material connected with the casing at points between the partitions and means for agitating the tubes.

tubes of 2. A dust collector comprising a frame, a casing carried by the frame, means for introducing dust laden air into the casing, radially disposed partitions disposed within the casing,-a drum journaled for rotation between the inner ends of the said partitions and provided at its sides with an opening, a blade carried by the drum and located below the said opening, tubes of woven material connected with the said casing at points between the partitions, spring supported sectors connected with the upper ends of the saidtubes and means for vibrating the said sectors vertically.

3. A dust collector comprising a frame, a casing mounted upon the frame, means for introducing dust laden air into the casing, partitions arranged radially Within the casing, a drum journaled for rotation between the inner ends of the said partitions and provided at its side with an opening, a blade carried by the drum and located below the said opening, a shaft attached to the drum, tubes of woven material connected with the top of the casing, sectors connected with the upper ends of the said tubes, a wheel mount ed upon the shaft and having a'set of ratchet teeth, means for rotating said wheel, and spring supported bolts attached to the sectors and having portions located in the path of movement of the said ratchet teeth.

In testimony whereof I aifix my signature.

CHARLES STAHN. 

